Hello, I'm a new owner of a 2013 Elantra 1.8L 6spd manual. I have just bought a K&N air filter and am very impressed with it so far. Aside from the stock filter, the K&N feels different for sure and it sounds a bit better to under the hood. My question is, I am planning on installing some type of exhaust as well. Should I keep everything K&N or look for something else? If anyone could post a link to a site that has options that would be great too.